Telephone call-box



"(No Modl.) I 2 Sheets-Sheet 1. J. M. ORANLH. M. SUTTON-8v H. GARRETT.

-' .TELBPHONE'GALL'BOX.

No. 292,570. Patented M11429, 1884;

(No Model.) 2 Sheets-Sheet J. M. ORAM, H. M. SUTTON & I-I. GARRETT.

TELEPHONE CALL BOX.

No 292.570. Patentd Jan. 29,- 1884.

WITNESS n. PETERS. nmmmm. mumm n. i;

ams swa 1,

JOHN M. ORAM, nurnv M. SUTTON, AND nmvnr (iAR-RETT,

- TEXAS.

PATENT @EYFICE OF DALLAS,

TELEPHONE CALL-BOX.

SPECIFICATION forming part of Letters Tatent No. 292,570, clatedJanuary29, 1 881, Application filed February 3, 1853. (No modcLY I To a, whomit may concern Be it known that W6,JOI-IN M. ORAM, HENRY M. SUTTON, andHENRY GARRETT, all of Dallas, in the county of Dallas and State ofTexas, have invented a new and Improved Telephone Call-Box, of which thefollowing is a full, clear, and exact description.

Our improvements may be applied to any ordinary call-box, and have theobject to reduce the number of movements required for operating the lineand prevent liability of mistakes or omissions.

' Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a vertical section of acall-box with our improvementsapplied. Fig. 2 is a front view of certain parts; and Figs. 3, 4, and 5represent modifications in the construction. p

The box W is provided with a transmitter, N, electrical bell K, and abattery, Y.

A is a lever pivoted at a, and provided with two arms, F G, for contactwith anvilsB, G, D, and E in the movement of the lever.

M is a cogged segment, connected to the lever for movement therewith.

B is the armature of a magneto-generator,

- which armature is made in the form of a cir-.

- mitter N and post 0. The point E connects by wires 5to a binding-post,I, and groundwire 8. From the battery Y circuit-wires 2 extend to thetransmitter N, a circuit-breaker, L, being included in the circuit. Theouter end of the lever A is formed for holding the receiver H, and infront of the end of the lever is fixed a slotted guard, T, so that thereceiver cannot be placed upon the lever until the latter is drawn downbelow the lower end of the guard, thelever extending through the slot'ofthe guard far enough toallow the lever to be drawn down to put thereceiver in place.

I is a fixed device, made in two pieces, as shown most clearly in Fig.2,and provided with rubber pads at its ends and between its two sides,which serve as bumpers, to prevent shocks in case the receiver or thelever should slip.. b is a spring, which draws the lever A upward.

In the normal position of the par ts, with the receiver hung from thelever, as shown in Fig. 1, the binding-posts ofthe receiver come incontact with the lower end of the bumperpiece I, and the arms F G of thelever are thereby held in contact with the anvils O E, therebyconnecting the call-bellKin the main circuit through the connections 1,5, and 8,'so

that a call from the central office will operate the bell.

To answer a call, the receiver is mo ved from the lever, which allowsthe lever to move up ward until it strikes the upper bumper, therebyshiftingthe arm G into contact with the anvil D and bringing thereceiver and transmitter in circuit; but in order to remove the receiverfrom the lever, it is necessary to pull the latter down below the lowerend of the guard T. This downward movement, by rotating the armature ofthe magneto-machine and bringing the circuit-wires 6 into line, willhave the effect to ring up the central office.

The lever A, being then released, rises to its highest point, and themain circuit is established through the instrument, and in this latterposition the arm F, coming into contact with the circuit-breaker L,brings'the battery Y in connection with the transmitter. When theinstrument is again hung on the lever, it

is done by catching the ring upon the end of the lever, in order to pullthe lever down, and

this motion will again signal the central office and operate thering-oft attachment.

On account of the long leverage sufficient power is obtained tooperatethe armature B, and the extent of movement is sufficient to givethe armature nearly'two revolutions.

In the modifications shown in Fig. 3, the guard T is secured upon thelever A at its end a, and is made of flexible material, to allow of itsOuter end being raised from the lever for the removal of the receiver.The guard is recessed to give space to the ring of the receiver, andupon the guard is a pin or projection, b, which comes in contact with afixed block, 0, when the lever reaches nearly the end of its downwardmovement, and the guard thus raised far enough to allow the receivertohe slipped otl.

For call-boxes already in use and which are provided with crank-handles,the guard may be applied as shown in Figs. i and 4.

d is the shaft. 6 is the crank-handle, as usual, and T is the guard,attached upon the handle. The guard is provided with a pin, f, whichengages a stop, 9, sufficiently to raise it from the crank-handle justbefore the crank strikes the stop, thus allowing the receiver to besecured in place or removed. The shaft d carries ashunt-cam, 71.

In Fig. at, which is a front view of the de vices shown in Fig. I, itwill be seen that the pin f of the spring-guard T rests upon the stop 9,and in removing the tel ephone-receiver from its support, the crank c isslightly moved in the direction of the arrow.

Fig. 5 shows our guard attachment as applied to a push-button box. A isthe lever, and T the fixed guard, arranged substantially as shown inFig. 1; The lever is pivoted at i, and carries an armature before thehelices l. The armature is carried on the lever by means of an arm, in,and slotted link a, which allow the lever A to rise after the armaturehits the cores, thereby operating the shunts. The shunting devices aresubstantially the same as before described.

In defining our invention with greater clearness, we would state that weare aware of the arrangement of parts shown in the Patents Nos.

222,201 and 269,225, and do not claim anything shown therein.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent- 1. In a telephone call-box, the combination ofthe lever A, formed with arms F G, the anvils B, U, D, and E, agenerator operated by the movement of the lever,'and thecircuiteonnections, substantially as shown and described.

2. The combination, with the switch-anvils, of a switch, a movablesupport for the telephone-receiver attached to the switch, and a guardfor preventing the receiver from being removed from its support untilthe switch has been adjusted to the magneto-call terminals, the saidtelephone-support having a range ot' movement from its normal positionfor receiving calls, first, down below the guard, to send a call andpermit the dislodgment of the telephone, and then a movement to theopposite side of its normal position, to make connection with thebattery telephone and transmitter, substantially as described.

8. The combination, with the switch-anvils, of a switch, atelephone-receiver support attached thereto for movement in unisontherewith, a guard for preventing dislodgment of the receiver until itssupport is moved, and a magneto-generator connected to and arranged tobe operated by the movement of the telephonereceiver support when saidreceiver is dislodged from its support, substantially as shown anddescribed.

4. The slotted piece I, in combination with the lever A and receiver IIof the circuit-eonnections, substantially as shown and described.

.TNO. M. ORAM. HENRY 3L SUTTON. HESRY GARRETT. \Vitnesses:

Guns. FRED. TUCKER, M. L. ROBERTSON.

